GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 2FG7J7LUKZ2QE4NKJ

According to the passage, each of the following may be used to gauge biological complexity EXCEPT A. length of an organism's spine B. thickness of an organism's spine C. an organism's ability to process information D. longevity of a species E. variety of cell types in an organism